Shader "Custom/ScrollShader"
{
    Properties
    {
        _MainTex ("Texture", 2D) = "white" {}
        _ScrollSpeedY ("Scroll Speed Y", Float) = 1.0
        _Color ("Tint Color", Color) = (1, 1, 1, 1)
    }
    SubShader
    {
        Tags { "RenderType"="Transparent" "Queue"="Transparent" }
        LOD 100

        Blend SrcAlpha OneMinusSrcAlpha
        ZWrite Off
        Cull Off

        Pass
        {
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag

            #include "UnityCG.cginc"

            struct appdata_t
            {
                float4 vertex : POSITION;
                float2 uv : TEXCOORD0;
            };

            struct v2f
            {
                float2 uv : TEXCOORD0;
                float4 vertex : SV_POSITION;
            };

            sampler2D _MainTex;
            float4 _MainTex_ST;
            float _ScrollSpeedY;
            float4 _Color;

            v2f vert (appdata_t v)
            {
                v2f o;
                o.vertex = UnityObjectToClipPos(v.vertex);
                
                // Adjust UV coordinates to scroll in the Y direction
                float scrollY = _Time.y * _ScrollSpeedY;
                o.uv = v.uv;
                o.uv.y += scrollY;

                return o;
            }

            fixed4 frag (v2f i) : SV_Target
            {
                // Sample the texture using the updated UV coordinates
                fixed4 col = tex2D(_MainTex, i.uv) * _Color;
                return col;
            }
            ENDCG
        }
    }
    FallBack "Transparent/Diffuse"
}